I would only consider it if the mirror was wide enough that it easily accommodates both sinks at the same time. If it is a narrow mirror that you both have to move away from the sink to use, that would feel quite awkward in my opinion.

You can do it either way (see examples below) -- it's just a matter of preference. It does seem like two separate mirrors are more popular these days.

A Historic Primary Bathroom Remodel · More Info

Karras Res. · More Info

We found a black framed mirror (of all places Lamps Plus) that we hung horizontally over both of our bathroom sinks - it was long enough to cover all but about 6” from each wall. It worked out beautifully!

Maybe we can help find a mirror to best suite your design! We have a selection of LED Mirrors in various shapes and sizes. Below I have attached some pictures for reference and a link to view more!

Click HERE for all LED Mirrors and more